Sleep Laboratories or Sleep Clinics are the gold standard for diagnosing obstructive sleep apnea and central sleep apnea. These specialized medical sleep centers are equipped for overnight stays and offer the patient a comfortable setting for observation of sleep architecture and titration of durable medical equipment to support sleep study finding. Durable medical equipment (DME) for sleep medicine includes CPAP (continuous positive airway pressure), APA (automatic positive airway pressure) and Bi-PAP (bi-level positive airway pressure) machines.